1001919889 has 4 divisors (see below), whose sum is σ = 1007455540. Its totient is φ = 996384240.

The previous prime is 1001919857. The next prime is 1001919953. The reversal of 1001919889 is 9889191001.

1001919889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26419600 + 975500289 = 5140^2 + 31233^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001919889 - 2⁵ = 1001919857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001989889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2767554 + ... + 2767915.

It is an arithmetic number, because the mean of its divisors is an integer number (251863885).

Almost surely, 2^1001919889 is an apocalyptic number.

It is an amenable number.

1001919889 is a deficient number, since it is larger than the sum of its proper divisors (5535651).

1001919889 is an equidigital number, since it uses as much as digits as its factorization.

1001919889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5535650.

The product of its (nonzero) digits is 46656, while the sum is 46.

The square root of 1001919889 is about 31653.1181560364. The cubic root of 1001919889 is about 1000.6395538836.

The spelling of 1001919889 in words is "one billion, one million, nine hundred nineteen thousand, eight hundred eighty-nine".